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ASP1400

Bidirectional Differential

Pressure Meter

_ Ultra low differential pressure from

100 Pa down to 0.002 Pa

_ Zero drift & offset free

_ Outstanding accuracy and resolution

_ Ultra fast response time

_ Fully calibrated & temperature compensated

_ Digital output signal

Preliminary Information as of October 2001

ASP1400 Product Summary

The ASP1400 differential pressure sensor is especially

suited for measurements of ultra low pressure

differences of gases and true mass flow measurements

in bypass solutions.

The micro-machined silicon sensor element of the

ASP1400 enables extremely long term stable and offset

free measurements. Its leading performance is based on

SENSIRION鈥檚 unsurpassed CMOSens鈩?technology.

With CMOSens鈩? the on-chip sensor element forms an

integrated whole with the amplification and A/D converter

circuit. This results in superior resolution, fast response

time and large dynamic range at lowest power

consumption.

All measurement data is fully calibrated and temperature

compensated by means of an internal micro controller.

Mounted in rugged, chemically inert PBT housing the

ASP1400 is suitable for a wide range of applications.

Such include for example monitoring of clean room

conditions, intrusion detection and almost unlimited

bypass solutions in process control, building control as

well as medical applications.

Bypass solutions allow a true mass flow measurement.

The sensor housing provides two inlets for measuring

the differential pressure and withstands overpressures of

2 bar (29 psi).

The ASP1400 requires a supply voltage of 7鈥?8Vdc

and provides an RS-232 and SPI compliant electrical

interface.

A S P 1 4 0 0 D I. . E R E N T IA L P R E S S U R E S E N S O R

G A S . L O W

V O L T A G E

R E G U L A T O R

G N D

V D D

P o w e r

S u p p ly

D I. . E R E N T IA L P R E S S U R E

C M O S e n s

c 

S E N S O R C H IP

M IC R O

C O N T R O L L E R

R S 2 3 2 L IN E

D R IV E R /

R E C E IV E R

A M P L I. IE R

T H E R M A L

S E N S O R

/C S

M O S I

M IS O

S C K

R x D

T x D

S P I

In te r fa c e

R S 2 3 2

In te r fa c e

A D C

E E P R O M

G A S . L O W

Figure 1: Block Diagram ASP1400 Differential Pressure Sensor with CMOSens鈩?technology

www.sensirion.com

Sensirion AG, Eggb眉hlstr. 14, 8052 Z眉rich, Switzerland, Tel: +41 1 306 40 00, Fax: +41 1 306 40 30

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